export const bd09_To_gps84 = function(lng, lat) {
  var gcj02 = bd09_To_gcj02(lng, lat);
  var map84 = gcj02_To_gps84(gcj02.lng, gcj02.lat);
  return map84;
}
/**84转百度*/
export const gps84_To_bd09 = function (lng, lat) {
  var gcj02 = gps84_To_gcj02(lng, lat);
  var bd09 = gcj02_To_bd09(gcj02.lng, gcj02.lat);
  return bd09;
}
/**84转火星*/
export const gps84_To_gcj02 = function (lng, lat) {
  var dLat = transformLat(lng - 105.0, lat - 35.0);
  var dLng = transformLng(lng - 105.0, lat - 35.0);
  var radLat = lat / 180.0 * pi;
  var magic = Math.sin(radLat);
  magic = 1 - ee * magic * magic;
  var sqrtMagic = Math.sqrt(magic);
  dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
  dLng = (dLng * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
  var mgLat = lat + dLat;
  var mgLng = lng + dLng;
  var newCoord = {
      lng: mgLng,
      lat: mgLat
  };
  return newCoord;
}
/**火星转84*/
export const gcj02_To_gps84 = function (lng, lat) {
  var coord = transform(lng, lat);
  var lontitude = lng * 2 - coord.lng;
  var latitude = lat * 2 - coord.lat;
  var newCoord = {
      lng: lontitude,
      lat: latitude
  };
  return newCoord;
}
/**火星转百度*/
export const gcj02_To_bd09 = function (x, y) {
  var z = Math.sqrt(x * x + y * y) + 0.00002 * Math.sin(y * x_pi);
  var theta = Math.atan2(y, x) + 0.000003 * Math.cos(x * x_pi);
  var bd_lng = z * Math.cos(theta) + 0.0065;
  var bd_lat = z * Math.sin(theta) + 0.006;
  var newCoord = {
      lng: bd_lng,
      lat: bd_lat
  };
  return newCoord;
}
/**百度转火星*/
export const bd09_To_gcj02 = function (bd_lng, bd_lat) {
  var x = bd_lng - 0.0065;
  var y = bd_lat - 0.006;
  var z = Math.sqrt(x * x + y * y) - 0.00002 * Math.sin(y * x_pi);
  var theta = Math.atan2(y, x) - 0.000003 * Math.cos(x * x_pi);
  var gg_lng = z * Math.cos(theta);
  var gg_lat = z * Math.sin(theta);
  var newCoord = {
      lng: gg_lng,
      lat: gg_lat
  };
  return newCoord;
}

var pi = 3.1415926535897932384626;
var a = 6378245.0;
var ee = 0.00669342162296594323;
var x_pi = pi * 3000.0 / 180.0;
var R = 6378137;

function transform(lng, lat) {
  var dLat = transformLat(lng - 105.0, lat - 35.0);
  var dLng = transformLng(lng - 105.0, lat - 35.0);
  var radLat = lat / 180.0 * pi;
  var magic = Math.sin(radLat);
  magic = 1 - ee * magic * magic;
  var sqrtMagic = Math.sqrt(magic);
  dLat = (dLat * 180.0) / ((a * (1 - ee)) / (magic * sqrtMagic) * pi);
  dLng = (dLng * 180.0) / (a / sqrtMagic * Math.cos(radLat) * pi);
  var mgLat = lat + dLat;
  var mgLng = lng + dLng;
  var newCoord = {
      lng: mgLng,
      lat: mgLat
  };
  return newCoord;
}

function transformLat(x, y) {
  var ret = -100.0 + 2.0 * x + 3.0 * y + 0.2 * y * y + 0.1 * x * y + 0.2 * Math.sqrt(Math.abs(x));
  ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
  ret += (20.0 * Math.sin(y * pi) + 40.0 * Math.sin(y / 3.0 * pi)) * 2.0 / 3.0;
  ret += (160.0 * Math.sin(y / 12.0 * pi) + 320 * Math.sin(y * pi / 30.0)) * 2.0 / 3.0;
  return ret;
}

function transformLng(x, y) {
  var ret = 300.0 + x + 2.0 * y + 0.1 * x * x + 0.1 * x * y + 0.1 * Math.sqrt(Math.abs(x));
  ret += (20.0 * Math.sin(6.0 * x * pi) + 20.0 * Math.sin(2.0 * x * pi)) * 2.0 / 3.0;
  ret += (20.0 * Math.sin(x * pi) + 40.0 * Math.sin(x / 3.0 * pi)) * 2.0 / 3.0;
  ret += (150.0 * Math.sin(x / 12.0 * pi) + 300.0 * Math.sin(x / 30.0 * pi)) * 2.0 / 3.0;
  return ret;
}